diff --git a/src/gui/text/qfont.cpp b/src/gui/text/qfont.cpp
index 53344418a0c..63b13df38ba 100644
--- a/src/gui/text/qfont.cpp
+++ b/src/gui/text/qfont.cpp
@@ -2150,7 +2150,10 @@ bool QFont::fromString(const QString &descrip)
         if (l[2].toInt() > 0)
             setPixelSize(l[2].toInt());
         setStyleHint((StyleHint) l[3].toInt());
-        setWeight(QFont::Weight(l[4].toInt()));
+        if (count >= 16)
+            setWeight(QFont::Weight(l[4].toInt()));
+        else
+            setWeight(QFont::Weight(qt_legacyToOpenTypeWeight(l[4].toInt())));
         setStyle((QFont::Style)l[5].toInt());
         setUnderline(l[6].toInt());
         setStrikeOut(l[7].toInt());
diff --git a/tests/auto/gui/kernel/qguivariant/test/tst_qguivariant.cpp b/tests/auto/gui/kernel/qguivariant/test/tst_qguivariant.cpp
index 5a01263d80a..9ef5ce75bf8 100644
--- a/tests/auto/gui/kernel/qguivariant/test/tst_qguivariant.cpp
+++ b/tests/auto/gui/kernel/qguivariant/test/tst_qguivariant.cpp
@@ -334,7 +334,7 @@ void tst_QGuiVariant::toFont_data()
     QTest::addColumn<QFont>("result");
 
     QFont f("times",12,-1,false);
-    QTest::newRow( "string" ) << QVariant( QString( "times,12,-1,5,400,0,0,0,0,0" ) ) << f;
+    QTest::newRow( "string" ) << QVariant( QString( "times,12,-1,5,50,0,0,0,0,0" ) ) << f;
 }
 
 void tst_QGuiVariant::toFont()
diff --git a/tests/auto/gui/text/qfont/tst_qfont.cpp b/tests/auto/gui/text/qfont/tst_qfont.cpp
index 4cc5a813294..28959a61bf0 100644
--- a/tests/auto/gui/text/qfont/tst_qfont.cpp
+++ b/tests/auto/gui/text/qfont/tst_qfont.cpp
@@ -601,7 +601,7 @@ void tst_QFont::toAndFromString()
 
     // Since Qt 6.0 it was changed to include more information in the description, so
     // this checks for compatibility
-    const QString fontStringFrom515(QLatin1String("Times New Roman,18,-1,5,700,1,0,0,1,0,Regular"));
+    const QString fontStringFrom515(QLatin1String("Times New Roman,18,-1,5,75,1,0,0,1,0,Regular"));
     QFont fontFrom515("Times New Roman", 18);
     fontFrom515.setBold(true);
     fontFrom515.setItalic(true);
@@ -628,7 +628,7 @@ void tst_QFont::toAndFromString()
 void tst_QFont::fromStringWithoutStyleName()
 {
     QFont font1;
-    font1.fromString("Noto Sans,12,-1,5,400,0,0,0,0,0,Regular");
+    font1.fromString("Noto Sans,12,-1,5,50,0,0,0,0,0,Regular");
 
     QFont font2 = font1;
     const QString str = "Times,16,-1,5,400,0,0,0,0,0,0,0,0,0,0,1";
@@ -639,7 +639,7 @@ void tst_QFont::fromStringWithoutStyleName()
     const QString fontStringFrom60(
             QLatin1String("Times New Roman,18,-1,5,700,1,0,0,1,0,1,0,150.5,2.5,50,2"));
     QFont font3;
-    font3.fromString("Noto Sans,12,-1,5,400,0,0,0,0,0,Regular");
+    font3.fromString("Noto Sans,12,-1,5,50,0,0,0,0,0,Regular");
     QFont font4 = font3;
     font4.fromString(fontStringFrom60);
     QCOMPARE(font4.toString(), fontStringFrom60);